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Table 1

Material present in the models of surface composition.

Material Amount (%) Grain size (μm)

Model 1 Crystalline H2O 60 18
Amorphous H2O 10.5 18
Titan tholins 2 10
Triton tholins 6 10
Blue compound 22.5 10
Model 2 Crystalline H2O 60 18
Amorphous H2O 5.5 18
Titan tholins 2 10
Triton tholins 6 10
Blue compound 22.5 10
Methane 5 100

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